US 12,139,738 B2
Processes and systems for biological hydrogen production from organic waste using yeast
Robert A. Kramer, Crown Point, IN (US); Libbie S. W. Pelter, Schererville, IN (US); and John A. Patterson, West Lafayette, IN (US)
Assigned to Purdue Research Foundation, West Lafayette, IN (US)
Appl. No. 17/763,761
Filed by Purdue Research Foundation, West Lafayette, IN (US)
PCT Filed Sep. 25, 2020, PCT No. PCT/US2020/052812
§ 371(c)(1), (2) Date Mar. 25, 2022,
PCT Pub. No. WO2021/062218, PCT Pub. Date Apr. 1, 2021.
Claims priority of provisional application 62/906,261, filed on Sep. 26, 2019.
Prior Publication US 2022/0340937 A1, Oct. 27, 2022
Int. Cl. C12P 3/00 (2006.01); C12N 1/16 (2006.01); C12N 1/18 (2006.01)
CPC C12P 3/00 (2013.01) [C12N 1/18 (2013.01)] 10 Claims
 
1. A process comprising biologically producing hydrogen gas from organic waste by anaerobic fermentation of the organic waste with at least one strain of yeast, wherein the anaerobic fermentation is performed in a reactor tank at an elevated temperature is about 32° C. to about 42° C., at a controlled pH of 5.5 to 5.9, at a pressure above atmospheric pressure but not greater than 12 Pa above atmospheric pressure, and at an oxygen level of less than 0.25% so that production of the hydrogen gas exceeds production of carbon dioxide over a period of twenty-four hours.